Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended				9 Months Ended
	Sep. 30, 2025 USD ($) institution shares	Jun. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) institution shares	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jul. 16, 2021 $ / shares	Jun. 16, 2021 $ / shares shares
Accounting Policies [Line Items]
Allowance of bad debt	$ 2,781,000	$ 1,638,000	$ 858,000	$ 2,756,000	$ 2,781,000	$ 858,000	$ 1,243,000	$ 8,748,000
Equity securities without readily determinable fair value	0				0		0
Amortization of right-of-use lease assets	0		0		0	0
Capitalized computer software, net	23,900,000				23,900,000		23,100,000
Capitalized computer software, amortization	2,900,000		3,100,000		9,100,000	8,400,000
Goodwill, impairment loss	0		0		0	0
Impairment charges	0		0		0	0
Operating lease, impairment loss	0		0		0	0
Lease, cost	1,500,000		1,700,000		4,700,000	5,800,000
Right-of-use assets	12,802,000				12,802,000		14,695,000
Payments for lease termination				100,000
Gain on lease termination		$ 100,000			0	109,000
Derecognizing on right of use asset				200,000
Derecognition on lease liability				$ 400,000
Contra rent expense	$ 0.0		200,000		$ 900,000	1,300,000
Tax receivable agreement liabilities as percent of expected benefit	85.00%				85.00%
Tax receivable agreement, percent recorded in additional paid-in capital	15.00%				15.00%
Tax receivable agreement, liability	$ 2,500,000				$ 2,500,000		$ 4,400,000
Change in tax receivable agreement liability	(1,550,000)		548,000		(460,000)	1,486,000
Cost of revenues (exclusive of depreciation and amortization shown separately below)	2,118,000		2,182,000		6,639,000	6,729,000
Advertising expense	3,400,000		2,000,000.0		$ 7,000,000.0	8,300,000
Requisite service period					2 years
Defined contribution cost	500,000		400,000		$ 1,700,000	1,400,000
Provision for income taxes	$ 13,000		$ 21,000		$ 22,000	$ 72,000
Number of financial institutions with cash balance exceeding FDIC limit | institution	4				4
Irvine Corporate Headquarters Lease
Accounting Policies [Line Items]
Lease renewal term			5 years
Weighted average discount rate			11.50%			11.50%
Lease liability			$ 3,300,000			$ 3,300,000
Right-of-use assets			3,300,000			3,300,000
Minimum | PRSUs outstanding
Accounting Policies [Line Items]
Target award					0.00%
Maximum
Accounting Policies [Line Items]
Employer matching contribution, percent of match					3.50%
Maximum | PRSUs outstanding
Accounting Policies [Line Items]
Target award					200.00%
Sales Discount
Accounting Policies [Line Items]
Cost of revenues (exclusive of depreciation and amortization shown separately below)	$ 2,200,000		$ 1,400,000		$ 6,000,000	$ 4,000,000
Class A Common Stock, $0.0001 par value per share
Accounting Policies [Line Items]
Right to purchase shares (in shares) | shares										1
Exercise price of warrant (in dollars per share) | $ / shares									$ 11.50	$ 11.50
Minimum requirement for cash settlement as percent of stockholders										50.00%
Payment to continuing members as percent of amount of tax benefit	85.00%				85.00%
Public Warrants
Accounting Policies [Line Items]
Origination warrants (in shares) | shares	12,499,993				12,499,993
Warrants outstanding (in shares) | shares	12,499,973				12,499,973
Private Placement Warrants
Accounting Policies [Line Items]
Origination warrants (in shares) | shares	7,000,000				7,000,000
Warrants outstanding (in shares) | shares	7,000,000				7,000,000
Computer equipment
Accounting Policies [Line Items]
Property and equipment, useful life	3 years				3 years
Furniture and fixtures
Accounting Policies [Line Items]
Property and equipment, useful life	7 years				7 years
Software technology
Accounting Policies [Line Items]
Property and equipment, useful life	3 years				3 years
Enhancements
Accounting Policies [Line Items]
Property and equipment, useful life	3 years				3 years